chemical reactions michelangelo la mattina. what is chemical reaction? chemical reaction tells you...
TRANSCRIPT
What is chemical reaction?• Chemical reaction tells you the substances
present before and after the reactions.• Reactants – substances that undergo change• Products – new substances formed as a result
of that change• The law of conservation of mass states that
mass is neither created nor destroyed in a chemical reaction.
• Should be balanced because the masses are equal, law conservation of mass
Chemical Equation• Reactants Products• Ex.
– C + O CO2
– Carbon + Oxygen Carbon Dioxide • Chemical Equation is a representation of a chemical reaction in which the reactants and products are expressed as formulas.
• The way it is read – “Carbon and oxygen react and form carbon dioxide” or “The reaction of carbon and oxygen yields carbon dioxide.
Classifying Reactions
• Synthesis Reactions
• Decomposition Reactions
• Single Displacement
• Double Displacement
Synthesis reactions
• Reaction in which two or more substances react to form a single substance
• Ex. A + B AB• 2Na + Cl2 2NaCl
• Eggs + Brownie mixture + water + oil Brownies
Decomposition
• Opposite of Synthesis reaction• Compound breaks down into two or
more simpler substances• AB A + B• Ex. 2H2O 2H2 + O2
• Candle Wick + Wax
Single Displacement• Reaction in which one element takes
the place of another element in a compound
• A + BC B + AC• Ex. Cu + 2AgNO3 2Ag + Cu(NO3)2
»Pepperoni + Cheese pizza Cheese + Pepperoni Pizza
Double Displacement
• Two different compounds exchange positive ions and form two new compounds
• AB + CD AD + CB• Ex. Pb(NO3)2 + 2KI PbI2 + 2KNO3
• French fries and ketchup + Hamburger and soda French fries and soda Hamburger and Ketchup
BACKGROUNDS CITED
• httpyorkcountyschools.orgteachersjchristmanchemistry.jpg• httpwww.flickr.comphotostheshyfox299678392sizeso